Change speed mechanism



Dec. 29, 1936. H. J. PERAZZOLI CHANGE SPEED MECHANISM Original FiledApril 22, 1933 4 Sheets-Sheet l Dec. 29, 1936. H J PERAZZOL] 2,066,050

CHANGE SPEED MECHANI SM Original Filed April 22, 1953 4 Sheets-Sheet 2Dec. 29, 1936. PERAZZOLI 2,066,050

CHANGE SPEED MECHANISM Original Filed April 22, 1933 4 Sheets-Sheet 3Dec. 29, 1936.

H. J. PERAZZOLI CHANGE SPEED MECHANI SM 4 Sheets-Sheet 4 Original FiledApril 22, 1933 Patented Dec. 29, 1936 UNITED STATES PATENT OFFICE AOriginal application April 22, 1933, Serial No. 667,448. Divided andthis application August 22, 1933, Serial No. 686,312

2 Claims.

This invention relates to new and useful improvements in railway trackgrinding machines and has particular relation to machines of thisgeneral character arranged to travel on the rails to be ground whereinthe source of power operable to reciprocate the abrasive elements on therails is available to propel the machine in its entirety from place toplace along the track, and is a division of my co-pending applicationSerial No. 667,448, filed April 22, 1933, now Patent No. 1,999,943,issued April 30, 1935.

Another important object of the invention is to provide a machine of thegeneral character set forth having novel means operable at will inconjunction with a source of motive power whereby the machine may bedriven in either direction on the track at various speeds.

A more specific object of the invention is to provide a machine of thegeneral character set forth having an internal combustion engineequipped with the usual change speed transmission comprising threespeeds in one direction and one speed in the opposite or reversedirection, together with novel means operable at will to render thethree speeds, otherwise available for travel of the machine in but onedirection, available to propel the machine in either direction on thetrack.

The invention contemplates in addition, numerous other features andnovel structural details which are set forth hereinafter and disclosedin the accompanying drawings in which:

Fig. 1 is a view in perspective of the machine embodying this inventionwith the body or superstructure removed therefrom to better display theoperable mechanisms of the machine to which the present invention isparticularly directed;

Fig. 2 is an enlarged view in section through the novel directioncontrol mechanism on line 2-2, Fig. 1;

Fig. 3 is an enlarged View in section on line 3-3, Fig. 2;

i Fig. 4 is a View in section on line 4-4, Fig. 3;

Fig. 5 is an enlarged plan view of the central portion of the disclosurein Fig. 2, showing the relation of the various parts of the directioncontrol mechanism in the neutral position;

Referring now more particularly to the drawings, the machine compriseslongitudinal and transverse side and end frame members I and 2respectively, and center sills 3. Axles 4 are mounted below and adjacenteach end of the frame transversely with respect thereto, said axles 4being mounted against springs (not shown) contained within housings 5secured'to the-main frame of the machine. Traction wheels 6 are mountedat each end of the axles 4 beyond the side frame members I and arearranged to travel upon the track to be ground. In the present instancean internal combustion engine M constitutes the motive power for thevarious operative mechanisms of the machine, and the engine is supportedby the frame and positioned longitudinally with respect thereto. Themotor M in the present instance is of the ordinary automobile or trucktype comprising the usual change speed transmission T, shift lever 8 andclutch lever 9.

The novel mechanism operable to change the effective direction ofrotation derived from the motor M for transmission to the variousmechanisms of the machine, is contained within a housing l secured tothe rear end of the transmission T, and the drive shaft ll extends intosaid housing I I], being supported therein by a bearing l2. Abeveledgear l3 having teeth I4 is mounted on the end of said shaft II by meansof a key I and arranged for rotation therewith. A shaft l6, constitutingthe main operating shaft of the machine, extends transversely throughthe, center of the housing l0 and has its ends journaled in bearings llin brackets Ila mounted on the side frame and sill members I and 3respectively.

A collar I8 is slidably mounted on the shaft "5 within the housing It!by means of keys l9 which, though permitting said collar to movelongitudinally with respect to said shaft, prevent relative rotation ofthe collar and shaft. An annular planetary or face gear 20 is mounted ateach end of the collar l8 and these gears are of such diameter that uponmovement of said collar IS on the shaft IS in either direction, theteeth 2! of one of said gears 20 will mesh with the teeth M of thebeveled gear l3 on the drive shaft II.

An annular groove 22 is formed in the collar [8 and arranged to receivea cam member 23, the inner concave surf-ace of which is doubly arced asshown at 24 and 25 for the purpose of eliminating any possible bindingof said cam 23 in the annular groove 22. The upper or convex surface ofthe cam 23 is provided with a hole 26 to receive an eccentric pin 21extending from the bottom of a circular bushing 28 which is similarlyprovided with an eccentrically positioned hole 29 in the top thereof toreceive the end of a shaft 30. In the present instance a pin 3| extendsdiametrically through the circular bushing 28 and the lower end of theshaft 30 for the purpose of preventing relative rotation of said shaftwith respect to the said bushing.

forth hereinafter.

w A top closure member 32 for the housing! is cast to include a verticalsupporting sleeve 33 for the shaft 30 and the lower end of said sleeveportion extends inwardly of the housing I as at 34 to prevent upwardmovement of the bushing 28 and disengagement ofthe pin 21 from the hole26 in the cam 23.

A bracket 35 is formed integral with the'cover member 3 2, the purposefor which will be set 3 A socket 36 is also formed integral with saidcover and is intended to slidably receive a pin 31 compressible inwardlythereof against a spring 38. The upper end of the pin '31 is arranged toengage recesses 39 formed in the under side of a stop member 40 having asleeve 4I which is keyedto the shaft 30, said recesses 39 and the stop40 being suitablypositioned circumferentially of the shaft so that thelatterfmay be releasably held in position when either one of theplanetary gears 20 is meshed with the beveled gear I3 or inrneutralposition.

- A circular; cam diskr42 is eccentrically keyed to the shaft 30 and itshould, be particularly 1 noted that the position of'said cam 42 withrespect to the shaft 30 ,is such that the diameter of the. cam whichintercepts the axis of the shaft is, at an angle of approximately I4degrees with the diameter of the shaft 30 which is horizontal withrespect to Fig. 3 of the drawings, and the purpose for so offsetting thecam 42 will be brought out hereinafter.

. A substantially L-shapedcam arm 43 is pivlotally mounted on the upperend of the 'cover bracket 35; and a cam roller 55 is mounted at the end'of' the short arm 46 thereof and arranged to ride.uponthefperiphery of:the cam disk 42. A rod 41 is slidably mounted in the clutch lever 9 andconnected at one end to the end of the long arm 48.0f the cam arm 43. A

collar 49 is fixed on the rod 4'I:to engage the clutch lever 9 and rockthe same forward to disengage the engine clutch when the cam arm 43 r ispivoted in a'clockwise direction with respect .to Fig. 4rby the cam disk42.

30 is such that the cam arm 43 is permitted to pivot in acounterclockwise direction to engage the clutch only when'said shaft 30is rotated, by movement of the handle 300; a quarter turn to the rightor left with respect to Fig. 4,. to mesh either one of the planetarygears 20 with the beveled gear I3. 7 I y Y From the foregoingdescriptionit will be seen that by meshing one of the planetary gears 20 with thebeveled gear I3 on the shaft II, rotation of the latter will be impartedto the shaft I6 in one direction and by meshing the other planetary gear20 with said beveled gear I3, rotation of the shaft II will be impartedto the shaft Win the opposite direction. Consequently it will be obviousthat with either one of the planetary gears meshed with the beveled gearI3,

the shaft I6 may be driven in that particular direction at each of thevarious speeds selected by operation of the transmission shift lever 8in the usual manner. V

with respect thereto by means 'of keys 59.

Rotation of the mainv operating shaft I is imparted to one of the axles4 to propel the machine along the railway track on the traction wheels6, by means of a chain. 50 which passes about a sprocket wheel 5|mounted on said axle and about a sprocket wheel 52 secured to a hub 53rotatably mounted with respect to the shaft I 5 by means of ,bearings53a. In the present instance one annular face ofthe hub 53 abuts theadjacent face of the direction change mechanism housing I0 and movementof the hub 53 longitudinally of the shaft I6 is prevented by a taperedpin 54 which extends diametrically through an annular retaining ring 55and the shaft I6. The outer annular face of the hub 53 is provided withcircumferential jaws 56 which.

constituteone member of a jaw. clutch designated generally as at'A,said'jaws being arranged to engage complementary jaws 51 formed vontheadjacent annular face of asleeve 58 adapted to rotate with the shaft I6and is slidably mounted In the present instance theijaws'5'lgof thesleeve 58 are moved into or out of engagement with the jaws 56 on thehub 53 by means of a shift lever 60 pivoted as atBI to the housing I Iawhich supports the bearing I! of the shaft I6. The lower end of thelever 60 is connected by means of aball and socket joint63 to a shipperrod 64 connected at its inner end as at 65to a ring segment 66 whichrides ln'an annular groove 61 formed in the sleeve 58. A spring pressedpin 68 is mounted in the bracket IIa and is arranged to engage recesses(not shown) formed in the shipper rod 64 to'releasably lock the'shipperrod in its extreme positions when the jaw clutch A is engaged ordisengaged respectively. In the present instance a brake drum 69 ismounted on the axle4adjacent the sprocket 5I and arranged to rotate withsaid axle internally of a brake shoe I0 which may be tightened about theperiphery of the drum 69 to retard rotation of the axle 4 by a brakelever II operatively connected to saidshoe by rods I2. It willbe obviousthat when the clutch A is engaged, rotation of the shaft I6 will beimparted to the hub 53 and sprocket 52 to the axle 4. v 1 V Thecustomary abrasive blocks (not shown)' but usually connected to the pin94 ofv-the crank 95 may be driven from the shaft I6, and drivingconnection is effected to said blocks by means of a clutch B, sprocketI01, chain I06, shaft -IOI,' chain 99, and shaft 93 which is connectedto the crank 95 previously mentioned.

In the presentinstance the sprocket I0! is. rotatably mounted on theshaft l6 and is connected to the latter through a jaw clutch designatedgenerally as B and operated'by means of a shift lever I08.

For the purpose of moving the entire machine from the track to aposition at one side thereof, a, roller I09 is mounted adjacent eachcorner of the machine; and these'rollers' are mounted in a screw andsleeve mechanism operable to permit said rollers to be lowered for thepurpose oflele vating the machine sumciently to raise the flanges to thelifting devices at that end of the machine through a transverse shaft II2 and beveled gears H3 and 'I I4, respectively..

A tank combining fuel and water compartments and respectively necessaryfor the operation of the internal combustion engine M may be mounted onthe frame of the machine adjacent one end thereof and. the customarywater cooling radiator I23 is mounted adjacent the forward end of saidengine M.

In operation of the device and supposing that the machine has arrived ata location along the track where grinding of the rails is necessary, thedirection control mechanism is in neutral position and the clutch A hasbeen disengaged, clutch B having been disengaged previously duringmovement of the machine along the track. Clutch B is engaged and one ofthe planetary gears 20 is meshed with the drive gear l3 by turninghandle 30a to complete the connection from the motor M to the grindingmechanism, the speed of reciprocation of which may be changed byoperation of the clutch 9 and change speed lever 8.

Upon completion of the grinding operation or if an approaching trainnecessitates rapid removal of the machine from the locus operandi, thedirection control is neutralized by turning handle 30a, and clutch Bdisengaged. Clutch A is then engaged by throwing lever 60 and one of thegears 20 meshed with the driving gear l3 by turning the handle 30a tocomplete the driving connection from the motor M to the axle 4 to propelthe machine along the track. It should be particularly noticed that thatplanetary gear 20 should be meshed with the gear I3 which will propelthe machine in the desired direction along the track at the variousspeeds which may be selected by operation of the shift lever 8,permitting the machine to get away rapidly at high speed by changingfrom low, through second to high speed ratio of the transmission.

While the preferred embodiment of the invention has been set forth forthe purposes of description, it is intended that certain changes andmodifications may be incorporated from time to time within the scope ofthe annexed claims.

What is claimed is:

1. In a machine, the combination with a motor including a variable speedtransmission and a clutch operatively associated therewith, of a drivinggear driven thereby, a transverse shaft adjacent said driving gear, asleeve slidably mounted on said transverse shaft and arranged forrotation therewith, spaced gears secured to said sleeve and arranged forselective engagement with the driving gear, means intermediate saidgears slidably engaging the sleeve, eccentric means engaging the lastmentioned means, means eccentrically engaging said eccentric means toactuate the same and the sleeve whereby one of the gears may be meshedwith the driving gear, and cam controlled means operatively associatedwith the actuating means to disengage the clutch during operation ofsaid actuating means.

2. In a machine, the combination with a motor including a clutchoperatively associated therewith, of a driving gear driven thereby, ashaft adjacent said driving gear, a sleeve slidably mounted on saidtransverse shaft and arranged for rotation therewith, gears secured tosaid sleeve and arranged for selective engagement with the driving gear,means slidably engaging the sleeve, eccentric means engaging the lastmentioned means, means eccentrically engaging said eccentric means toactuate the same and the sleeve whereby one of the gears may be meshedwith the driving gear, and cam controlled means operatively associatedwith the actuating means to disengage the clutch during operation ofsaid actuating means.

HENRY J. PERAZZOLI.

